A large purple jellyfish like creature with long skiny tenticals that stretches from the roof to the floor (whole height). Warhead mainly flys around the room in random directions attemting to hit the player.
While it is very hard to avoid Warhead because it is so fast, Shooting Warhead with weapons like the Grenade Launcher, Sickle, or the Trident while very effective is very hard to land a hit. It is recommended to stay as far away as possible at all times and shoot mainly in front of it.
If you hide in the very corner of the boss room, it cannot hit you.